21002103311027 has 2 divisors, whose sum is σ = 21002103311028. Its totient is φ = 21002103311026.

The previous prime is 21002103310999. The next prime is 21002103311047. The reversal of 21002103311027 is 72011330120012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21002103311027 - 2¹² = 21002103306931 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21002103310993 and 21002103311011.

It is not a weakly prime, because it can be changed into another prime (21002103311047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501051655513 + 10501051655514.

It is an arithmetic number, because the mean of its divisors is an integer number (10501051655514).

Almost surely, 2^{21002103311027} is an apocalyptic number.

21002103311027 is a deficient number, since it is larger than the sum of its proper divisors (1).

21002103311027 is an equidigital number, since it uses as much as digits as its factorization.

21002103311027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 23.

Adding to 21002103311027 its reverse (72011330120012), we get a palindrome (93013433431039).

The spelling of 21002103311027 in words is "twenty-one trillion, two billion, one hundred three million, three hundred eleven thousand, twenty-seven".